Observation of psi(3686) -> eta ' e(+)e(-)

doi:10.1016/j.physletb.2018.05.038

	Observation of psi(3686) -> eta ' e(+)e(-)
	BESIII Collaboration
刊名	PHYSICS LETTERS B
	2018
卷号	783 页码:452-458
关键词	e(+)e(-) Annihilation Dalitz decay Charmonium BESIII
ISSN号	0370-2693
DOI	10.1016/j.physletb.2018.05.038
文献子类	Article
英文摘要	Using a data sample of 448.1 x 10(6) psi(3686) events collected with the BESIII detector at the BEPCII collider, we report the first observation of the electromagnetic Dalitz decay psi(3686) -> eta'e(+)e(-), with significances of 7.0 sigma and 6.3 sigma when reconstructing the eta' meson via its decay modes eta' -> gamma pi(+)pi(-) and eta' -> pi(+)pi(-) eta (eta -> gamma gamma), respectively. The weighted average branching fraction is determined to be B(psi(3686) -> eta'e(+)e(-)) = (1.90 +/- 0.25 +/- 0.11) x 10(-6), where the first uncertainty is statistical and the second systematic. (C) 2018 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).
电子版国际标准刊号	1873-2445
WOS关键词	KLOE DETECTOR ; DECAYS ; E(+)E(-) ; ETA-E(+)E(-) ; PSEUDOSCALAR ; GENERATOR ; BESIII ; OMEGA ; PHI
WOS研究方向	Astronomy & Astrophysics ; Physics
语种	英语
WOS记录号	WOS:000441762300062
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/287035]
专题	高能物理研究所_实验物理中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	BESIII Collaboration. Observation of psi(3686) -> eta ' e(+)e(-)[J]. PHYSICS LETTERS B,2018,783:452-458.
APA	BESIII Collaboration.(2018).Observation of psi(3686) -> eta ' e(+)e(-).PHYSICS LETTERS B,783,452-458.
MLA	BESIII Collaboration."Observation of psi(3686) -> eta ' e(+)e(-)".PHYSICS LETTERS B 783(2018):452-458.